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/*
* linux/include/asm-arm/arch-ebsa110/time.h
*
* Copyright (c) 1996,1997,1998 Russell King.
*
* No real time clock on the evalulation board!
*
* Changelog:
* 10-Oct-1996 RMK Created
* 04-Dec-1997 RMK Updated for new arch/arm/kernel/time.c
* 07-Aug-1998 RMK Updated for arch/arm/kernel/leds.c
* 28-Dec-1998 APH Made leds code optional
*/
#include <linux/config.h>
#include <asm/leds.h>
#define IRQ_TIMER IRQ_EBSA110_TIMER0
#define MCLK_47_8
#if defined(MCLK_42_3)
#define PIT1_COUNT 0xecbe
#elif defined(MCLK_47_8)
/*
* This should be 0x10AE1, but that doesn't exactly fit.
* We run the timer interrupt at 5ms, and then divide it by
* two in software... This is so that the user processes
* see exactly the same model whichever ARM processor they're
* running on.
*/
#define PIT1_COUNT 0x8570
#define DIVISOR 2
#endif
extern __inline__ unsigned long gettimeoffset (void)
{
return 0;
}
#ifndef DIVISOR
extern __inline__ int reset_timer (void)
{
*PIT_T1 = (PIT1_COUNT) & 0xff;
*PIT_T1 = (PIT1_COUNT) >> 8;
return 1;
}
#else
extern __inline__ int reset_timer (void)
{
static unsigned int divisor;
#ifdef CONFIG_LEDS
static int count = 50;
#endif
*PIT_T1 = (PIT1_COUNT) & 0xff;
*PIT_T1 = (PIT1_COUNT) >> 8;
#ifdef CONFIG_LEDS
if (--count == 0) {
count = 50;
leds_event(led_timer);
}
#endif
if (divisor == 0) {
divisor = DIVISOR - 1;
return 1;
}
divisor -= 1;
return 0;
}
#endif
/*
* We don't have a RTC to update!
*/
#define update_rtc()
/*
* Set up timer interrupt, and return the current time in seconds.
*/
extern __inline__ unsigned long setup_timer (void)
{
/*
* Timer 1, mode 0, 16-bit, autoreload
*/
*PIT_CTRL = 0x70;
/*
* Refresh counter clocked at 47.8MHz/7 = 146.4ns
* We want centi-second interrupts
*/
reset_timer ();
/*
* Default the date to 1 Jan 1970 0:0:0
* You will have to run a time daemon to set the
* clock correctly at bootup
*/
return mktime(1970, 1, 1, 0, 0, 0);
}
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